Influence of high harmonics of magnetic fields on trapped magnetic fluxes in HTS bulk

K. Yamagishi, D. Miyagi, O. Tsukamoto

Research output: Contribution to journalConference articlepeer-review


Various kinds of HTS bulk motors are proposed and have been developed. Generally, those motors are driven by semiconductor inverters and currents fed to the armature windings contain high harmonics. Therefore, the bulks are exposed to high harmonics magnetic fields and AC losses are produced in the bulks. The AC losses deteriorate the efficiency of the motors and cause temperature rise of the bulks which decrease the trapped magnetic fluxes of the bulks. Usually, electro-magnetic shielding devices are inserted between the bulks and armature windings. However, the shielding devices degrade compactness of the motors. Therefore, it is important to have knowledge of the influence of the high harmonics magnetic fields on the AC losses and trapped magnetic fluxes of the bulk for optimum design of the shielding devices. In this work, the authors experimentally study the influence of high harmonics magnetic fields.

Original languageEnglish
Pages (from-to)1062-1066
Number of pages5
JournalPhysics Procedia
Publication statusPublished - 2012
EventSuperconductivity Centennial Conference, SCC 2011 - The Hague, Netherlands
Duration: 2011 Sep 182011 Sep 23


  • Ac loss
  • Harmonics
  • Hts bulk
  • Motor
  • Trapped magnetic flux

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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